I have basic peice of collision detection code up and running. It does
hirearchical bounding spheres down to the tree nodes and then does triangle v. triangle and returns the colision points,
It uses Java3D geometry, and doesn't yet undertsand all possible forms of Java3D geometry, but that is well encapsulated and should be easily modified or expanded.
Would it be useful for me to post it? I don't think it comented much yet

Also, would you gusy want the whoel thing, test program and all, or just key bits? (Diference is if you want all of it I need to find a palce to post a zip file. If you justw anted the trickiest bits, I could probably post those in the Shared Code section.)
JK